Robert W Graves
Rob Graves is a geophysicist in the Earthquake Science Center.
Science and Products
Filter Total Items: 66
Implications of the Mw9.0 Tohoku-Oki earthquake for ground motion scaling with source, path, and site parameters Implications of the Mw9.0 Tohoku-Oki earthquake for ground motion scaling with source, path, and site parameters
The Mw9.0 Tohoku-oki Japan earthquake produced approximately 2,000 ground motion recordings. We consider 1,238 three-component accelerograms corrected with component-specific low-cut filters. The recordings have rupture distances between 44 km and 1,000 km, time-averaged shear wave velocities of VS30 = 90 m/s to 1,900 m/s, and usable response spectral periods of 0.01 sec to >10 sec. The...
Authors
Jonathan P. Stewart, Saburoh Midorikawa, Robert W. Graves, Khatareh Khodaverdi, Tadahiro Kishida, Hiroyuki Miura, Yousef Bozorgnia, Kenneth W. Campbell
Sources of shaking and flooding during the Tohoku-Oki earthquake: a mixture of rupture styles Sources of shaking and flooding during the Tohoku-Oki earthquake: a mixture of rupture styles
Modeling strong ground motions from great subduction zone earthquakes is one of the great challenges of computational seismology. To separate the rupture characteristics from complexities caused by 3D sub-surface geology requires an extraordinary data set such as provided by the recent Mw9.0 Tohoku-Oki earthquake. Here we combine deterministic inversion and dynamically guided forward...
Authors
Shengji Wei, Robert Graves, Don Helmberger, Jean-Philippe Avouac, Junle Jiang
Validation of ground-motion simulations for historical events using SDoF systems Validation of ground-motion simulations for historical events using SDoF systems
The study presented in this paper is among the first in a series of studies toward the engineering validation of the hybrid broadband ground‐motion simulation methodology by Graves and Pitarka (2010). This paper provides a statistical comparison between seismic demands of single degree of freedom (SDoF) systems subjected to past events using simulations and actual recordings. A number of...
Authors
C. Galasso, F. Zareian, I. Iervolino, R.W. Graves
Comparison of ground motions from hybrid simulations to nga prediction equations Comparison of ground motions from hybrid simulations to nga prediction equations
We compare simulated motions for a Mw 7.8 rupture scenario on the San Andreas Fault known as the ShakeOut event, two permutations with different hypocenter locations, and a Mw 7.15 Puente Hills blind thrust scenario, to median and dispersion predictions from empirical NGA ground motion prediction equations. We find the simulated motions attenuate faster with distance than is predicted by...
Authors
L.M. Star, J.P. Stewart, R.W. Graves
The ShakeOut earthquake source and ground motion simulations The ShakeOut earthquake source and ground motion simulations
The ShakeOut Scenario is premised upon the detailed description of a hypothetical Mw 7.8 earthquake on the southern San Andreas Fault and the associated simulated ground motions. The main features of the scenario, such as its endpoints, magnitude, and gross slip distribution, were defined through expert opinion and incorporated information from many previous studies. Slip at smaller...
Authors
R.W. Graves, Douglas B. Houston, K.W. Hudnut
Testing long-period ground-motion simulations of scenario earthquakes using the Mw 7.2 El Mayor-Cucapah mainshock: Evaluation of finite-fault rupture characterization and 3D seismic velocity models Testing long-period ground-motion simulations of scenario earthquakes using the Mw 7.2 El Mayor-Cucapah mainshock: Evaluation of finite-fault rupture characterization and 3D seismic velocity models
Using a suite of five hypothetical finite-fault rupture models, we test the ability of long-period (T>2.0 s) ground-motion simulations of scenario earthquakes to produce waveforms throughout southern California consistent with those recorded during the 4 April 2010 Mw 7.2 El Mayor-Cucapah earthquake. The hypothetical ruptures are generated using the methodology proposed by Graves and...
Authors
Robert W. Graves, Brad T. Aagaard
Science and Products
Filter Total Items: 66
Implications of the Mw9.0 Tohoku-Oki earthquake for ground motion scaling with source, path, and site parameters Implications of the Mw9.0 Tohoku-Oki earthquake for ground motion scaling with source, path, and site parameters
The Mw9.0 Tohoku-oki Japan earthquake produced approximately 2,000 ground motion recordings. We consider 1,238 three-component accelerograms corrected with component-specific low-cut filters. The recordings have rupture distances between 44 km and 1,000 km, time-averaged shear wave velocities of VS30 = 90 m/s to 1,900 m/s, and usable response spectral periods of 0.01 sec to >10 sec. The...
Authors
Jonathan P. Stewart, Saburoh Midorikawa, Robert W. Graves, Khatareh Khodaverdi, Tadahiro Kishida, Hiroyuki Miura, Yousef Bozorgnia, Kenneth W. Campbell
Sources of shaking and flooding during the Tohoku-Oki earthquake: a mixture of rupture styles Sources of shaking and flooding during the Tohoku-Oki earthquake: a mixture of rupture styles
Modeling strong ground motions from great subduction zone earthquakes is one of the great challenges of computational seismology. To separate the rupture characteristics from complexities caused by 3D sub-surface geology requires an extraordinary data set such as provided by the recent Mw9.0 Tohoku-Oki earthquake. Here we combine deterministic inversion and dynamically guided forward...
Authors
Shengji Wei, Robert Graves, Don Helmberger, Jean-Philippe Avouac, Junle Jiang
Validation of ground-motion simulations for historical events using SDoF systems Validation of ground-motion simulations for historical events using SDoF systems
The study presented in this paper is among the first in a series of studies toward the engineering validation of the hybrid broadband ground‐motion simulation methodology by Graves and Pitarka (2010). This paper provides a statistical comparison between seismic demands of single degree of freedom (SDoF) systems subjected to past events using simulations and actual recordings. A number of...
Authors
C. Galasso, F. Zareian, I. Iervolino, R.W. Graves
Comparison of ground motions from hybrid simulations to nga prediction equations Comparison of ground motions from hybrid simulations to nga prediction equations
We compare simulated motions for a Mw 7.8 rupture scenario on the San Andreas Fault known as the ShakeOut event, two permutations with different hypocenter locations, and a Mw 7.15 Puente Hills blind thrust scenario, to median and dispersion predictions from empirical NGA ground motion prediction equations. We find the simulated motions attenuate faster with distance than is predicted by...
Authors
L.M. Star, J.P. Stewart, R.W. Graves
The ShakeOut earthquake source and ground motion simulations The ShakeOut earthquake source and ground motion simulations
The ShakeOut Scenario is premised upon the detailed description of a hypothetical Mw 7.8 earthquake on the southern San Andreas Fault and the associated simulated ground motions. The main features of the scenario, such as its endpoints, magnitude, and gross slip distribution, were defined through expert opinion and incorporated information from many previous studies. Slip at smaller...
Authors
R.W. Graves, Douglas B. Houston, K.W. Hudnut
Testing long-period ground-motion simulations of scenario earthquakes using the Mw 7.2 El Mayor-Cucapah mainshock: Evaluation of finite-fault rupture characterization and 3D seismic velocity models Testing long-period ground-motion simulations of scenario earthquakes using the Mw 7.2 El Mayor-Cucapah mainshock: Evaluation of finite-fault rupture characterization and 3D seismic velocity models
Using a suite of five hypothetical finite-fault rupture models, we test the ability of long-period (T>2.0 s) ground-motion simulations of scenario earthquakes to produce waveforms throughout southern California consistent with those recorded during the 4 April 2010 Mw 7.2 El Mayor-Cucapah earthquake. The hypothetical ruptures are generated using the methodology proposed by Graves and...
Authors
Robert W. Graves, Brad T. Aagaard